中国科学院南海海洋研究所机构知识库
Advanced  
SCSIO OpenIR  > 海洋科技动态信息-印太暖池系统研究  > 期刊论文
学科主题: Multidisciplinary Sciences
题名: Palaeoceanographic and palaeoclimatic history of ODP site 763A (Exmouth Plateau), southeast Indian Ocean: 2.2 Ma record of planktic foraminifera
作者: Sinha, DK ; Singh, AK ; Tiwari, M
通讯作者: devasinha@yahoo.com
关键词: isohyet analysis ; synoptic scale feature ; scale interaction ; thunderstorm
刊名: CURRENT SCIENCE
发表日期: 2006-01-01
卷: 90, 期:10, 页:1363-1369
收录类别: sci
部门归属: Banaras Hindu Univ, Dept Geol, Varanasi 221005, Uttar Pradesh, India; Phys Res Lab, Ahmedabad 380009, Gujarat, India
摘要: The western margin of Australia is unique in being the only eastern boundary region undergoing no upwelling as the poleward flowing Leeuwin Current (LC) nullifies the equatorward-driven wind-induced circulation. The principal forcing mechanism of the Leeuwin Current is the alongshore pressure gradients and associated zonal geostrophic flows along the West Australian margin. Based on planktic foraminiferal census counts and stable isotopic analysis of a surface-dwelling planktic foraminifera, Globigerinoides sacculifer, we show that during the Quaternary there have been five intervals when this eastern boundary region behaved in an opposite manner and the margin experienced extensive upwelling due to weakening of the LC and dominance of equatorward wind-driven circulation, causing offshore Ekman transport. These events occurred at 2.22, 1.83, 0.68, 0.45 and 0.04 Ma and have been named here as PL-1 to PL-5 in ascending stratigraphic order. We demonstrate here that the previous two events, PL-1 and PL-2, occurred due to ENSO-induced changes in the Western Pacific Warm Pool, while the last three events, PL-3, PL-4, and PL5, occurred due to reduced Indonesian throughflow as a result of lowered sea level caused by ice volume expansion. We envisage here that these periods must be those of reduced net heat input to the Indian Ocean from the Pacific via Indonesian Seaway and thus should have an effect on sea surface temperature of the Indian Ocean and Indian monsoon.
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/8463
Appears in Collections:海洋科技动态信息-印太暖池系统研究_期刊论文

Files in This Item:

There are no files associated with this item.


Recommended Citation:
Sinha, DK; Singh, AK; Tiwari, M.Palaeoceanographic and palaeoclimatic history of ODP site 763A (Exmouth Plateau), southeast Indian Ocean: 2.2 Ma record of planktic foraminifera,CURRENT SCIENCE,2006,90(10):1363-1369
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Sinha, DK]'s Articles
[Singh, AK]'s Articles
[Tiwari, M]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Sinha, DK]‘s Articles
[Singh, AK]‘s Articles
[Tiwari, M]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院南海海洋研究所 - Feedback
Powered by CSpace